Workpiece deforming press including a safety device

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a workpiece deforming press including a plurality of press dies, arranged on a horizontal plane included in the press housing.

[0002] The above prior dies control corresponding die punches, thereby it is possible to deform, by said dies and punches, the workpiece, starting from a raw workpiece body which is gradually deformed to provide a finished shaped or contoured workpiece.

[0003] Deforming presses of the above mentioned type are already known in the prior art.

[0004] DE 335 260 C1 and US 7 127 931 B1 disclose workpiece deforming presses including a safety device.

[0005] The dies and punches, in prior large size presses, are arranged in a press housing having a comparatively large size and depth.

[0006] The press housing is upward open and, for adjusting the die and punch tools, and for replacing the latter as necessary, the press operator must necessarily access the press housing. Before performing such an access, the deforming press must be turned off, to prevent the press operator from being seriously damaged because of an uncontrolled movement of the deforming punches toward the press dies.

[0007] Unfortunately, the accident factor is frequently a permanent one, since the press operator frequently does not remember to turn off the press, as required by safety rules. Moreover, some deforming tool adjusting operations require a step by step movement between the deforming dies and punches.

[0008] Safety rules and standards require moreover to provide, in operating machines in general, safety means to prevent the machine operator from being damaged by movable machine elements. However, even if these safety rules are observed, it is not possible to fully eliminate dangerous conditions occurring in performing necessary operations on tools and equipments, for example on the press dies or punches.

[0009] In particular, the above mentioned inevitable dangers are related to a hindered movement at the working region near the dies and punches, and to the fact that, at this region, deposits of oil, dirt, or metal chips are always present.

SUMMARY OF THE INVENTION

[0010] Accordingly, the main object of the present invention is to provide such a safety device adapted to overcome the above mentioned drawbacks of the prior art, and allowing an operator to safely approach the deforming press tools without accessing the deforming press housing.

[0011] Another object of the invention is to provide such a safety device allowing the press tool region to be easily and safely accessed, thereby reducing as far as possible any slipping, stumbling and falling dangers for the operator.

[0012] Another object of the invention is to safely prevent covering panels from being soiled by oil which could cause the press operator to slip.

[0013] According to the present invention, the above mentioned objects are achieved by a workpiece deforming press, including a press for housing therein a plurality of press dies and punches arranged on a horizontal plane in said press housing, wherein a first wall delimiting said press housing comprises a top horizontal guide bearing a sliding slide, wherein said sliding slide bears, through a first linear actuator, a first overturning plane, supported by a fulcrum and adapted to be actuated by a second linear actuator and wherein said sliding slide further bears a second overturning plane supported by said fulcrum and adapted to be actuated by a cylinder-piston unit.

[0014] In this connection it should be pointed out that the term "linear actuator" means herein hydraulic cylinders, pneumatic cylinders, a worm screw - nut screw assembly or the like devices.

BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Further characteristics of the press according to the present invention will become more apparent hereinafter from the following description, the dependent claims and the accompanying drawings.

[0016] The subject matter of the present invention will be disclosed in a more detailed manner hereinbelow with reference to an exemplary embodiment thereof which is shown in the accompanying drawings, where:

Figure 1 shows the housing of the deforming press including the deforming dies and having a safety device in an idle or deactuated condition thereof;

Figure 2 shows the device of figure 1, with the safety means brought from a rest or standby position thereof to an actuated position thereof;

Figure 3 shows the device according to figure 1, with a first safety means in a working position or condition thereof;

Figure 4 shows the device of figure 1, with both the safety devices in a working position thereof;

Figure 5 is a schematic top plan view showing the press housing with the second safety means both in a rest vertical position and in a horizontal working position thereof; and

Figure 6 is a schematic side view showing the press housing closed by an overturning plane or panel.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0017] Figures 1 to 4 show the region of the dies in a cold deforming press, generally indicated by 1.

[0018] The press 1 has a comparatively deep housing, indicated by 2. This press housing 2 includes, on a horizontal plane, a plurality of dies 3 cooperating with punches 3' to gradually deform the workpieces.

[0019] The provision of a service housing 2, as well as the arrangement of the dies 3 and corresponding deforming punches 3' are well known in the prior art.

[0020] The press housing 2 is delimited by delimiting shoulders or walls 4 and 5 of the press body, said walls being spaced from one another by a distance A.

[0021] The wall 4 comprises a top horizontal guide indicated by 6.

[0022] On the guide 6 is movably arranged, on a horizontal plane, a strong slide 7.

[0023] The wall 5, opposite to the wall 4, comprises a bearing step 8 which will be disclosed in a more detailed manner hereinafter.

[0024] In figure 1, the slide 7 is reversely driven by a linear actuator 9, to prevent the two overturning planes 10 and 11 from hindering a free access (A) to the press housing 2.

[0025] Thus, by operating the linear actuator 9, as shown in figure 2, the slide 7 is forwardly driven on the guide 6 to arrange the overturning planes 10 and 11 above the press 1 housing 2.

[0026] On the other hand, by operating the linear actuator 12, as shown in figure 3, the first overturning plane 10, supported by a supporting fulcrum 20, is overturned to a horizontal position, thereby closing the underlying housing 2, in this horizontal position, the plane 10 bearing by its free end portion on an abutment step 8, formed inside the wall 5.

[0027] Thus, with the first plane 10 arranged at a horizontal position, as shown, this plane 10 can be traveled over and, accordingly, the operator may perform, at a commode and safe position, adjusting, respectively replacing, operations on the tools, for example of the dies 3 and punches 3'.

[0028] Accordingly the operator must not access the deep housing 2 and, consequently, he will not be subjected to dangers.

[0029] Advantageously, the plane 10 is supported by a Z-shape structure 13.

[0030] Thus, it is possible to bring the plane 10 to a slightly lower level inside the recess 2, to allow the operator to easily operate or adjust the dies 3 and punches 3'.

[0031] By actuating the cylinder - piston unit 14, as shown in figure 4, the second overturning plane 11 is also oscillated from a vertical position, shown in figures 1, 2 and 3, to a horizontal position, at which it will safely lie on the top of the wall 5 while safely closing the housing including the dies 3 and punches 3'.

[0032] Figure 5 is a schematic top plan view showing the second overturning plane 11 which, in its working horizontal position, fully closes the housing 2 between the dies 3 and punches 3', thereby providing a safe trampling on plane.

[0033] Figure 6 shows the overturning plane 11 easily accessed by the operator to replace and adjust the grippers 22 of the transfer unit , overturned through about 90° from the working position, and to also adjust the gripper opening and closing cams 21.

[0034] Thus, by operating the linear actuator 9, the slide 7 and overturning planes 10, 11, still arranged at a vertical position, are driven (f) to their overturned position (figure 2).

[0035] On the other hand, by operating the linear actuator 12, the overturning plane 10 is oscillated (g) from a vertical to a horizontal position, thereby closing the press housing 2 (figure 3).

[0036] Finally, by operating the cylinder - piston unit 14, the overturning plane 11 is also oscillated (h) from a vertical to a horizontal position, thereby closing the housing 2 in which said dies 3 and punches 3' (figure 4) operate.

[0037] To safely drive the swinging plane 10 or 11, a device is herein provided which, in a raised position of the overturning planes, actuates, at the positions shown in figures 2, 3 and 4, a mechanism for preventing press elements in the press housing 2 from performing undesired movements.

Claims

1. A workpiece deforming press with a safety device, including a press housing (2) for housing a plurality of press dies (3) and punches (3'), arranged in a horizontal plane in the press (1) housing (2), characterized in that a first wall (4) delimiting said housing (2) comprises a top horizontal guide (6) bearing a sliding slide (7), that said sliding slide (7) bears, through a first linear actuator (9) a first overturning plane (10) supported by a supporting fulcrum (20) and adapted to be actuated by a second linear actuator (12), and that said sliding slide (7) bears a second overturning plane (11) supported by said supporting fulcrum (20) and adapted to be actuated by a further third linear actuator (14).

2. A workpiece deforming press, according to claim 1, characterized in that a second wall (5) opposite to the first wall (4) and delimiting said housing (2) comprises an inner step (8) thereon, wherein said inner step (8) bears a free end portion of the first overturning plane (10) when said first overturning plane (10) is in a horizontal position.

3. A workpiece deforming press, according to claim 1, characterized in that the first overturning plane (10) is supported by a Z-shape structure (13) projecting, with said first overturning plane (10) in a horizontal position, into the housing (2).

4. A workpiece determing press, according to claim 1, characterized in that the second overturning plane (11) lies, in a horizontal position thereof, on a top of said housing (2) delimiting second wall (5).

Ansprüche

1. Presse zum Umformen von Werkstücken, mit einer Sicherheitsvorrichtung, die einen Pressenraum (2) umfasst, in der eine Vielzahl von Matritzen (3) und Stempel (3') vorgesehen ist, die in einer horizontalen Ebene des Pressenraumes (2) der Presse (1) angeordnet sind, dadurch gekennzeichnet, dass eine erste Wand (4), die den Pressenraum (2) begrenzt, eine obere, horizontal angeordnete Führung (6) aufnimmt, die einen verschiebbaren Schlitten (7) aufnimmt, wobei dieser verschiebbare Schlitten (7) über einen ersten linear verschiebbaren Antrieb (9), eine erste kippbare Ebene (10) aufnimmt, die von einem Lagerzapfen (20) aufgenommen wird und derartig ausgebildet ist, dass sie über einen Antrieb (12) antreibbar ist und, dass dieser verschiebbare Schlitten eine zweite kippbare Ebene (11) aufnimmt, die von genanntem Lagerzapfen (20) aufgenommen wird, und derartig ausgebildet ist, dass ein Antrieb über eine dritte, linear angeordnete Antriebsvorrichtung (14) erfolgt.

2. Presse zum Umformen von Werkstücken, nach Patentanspruch 1, dadurch gekennzeichnet, dass eine zweite Wand (5), die der ersten Wand (4) gegenüberliegt und den Maschinenraum (2) begrenzt eine innere Stufe (8) aufweist und, dass diese innere Stufe (8) ein freies Ende der ersten kippbaren Ebene (10) in horizontaler Lage aufnimmt.

3. Presse zum Umformen von Werkstücken, nach Patentanpruch 1, dadurch gekennzeichnet, dass die erste kippbare Ebene (10) von einer Vorrichtung (13) gelagert wird, die Z-Form aufweist und zusammen mit der ersten kippbaren Ebene (10) in einer horizontale Lage in den Pressenraum (2) dringt.

4. Presse zum Umformen von Werkstücken, nach Patentanpruch 1, dadurch gekennzeichnet, dass die genannte zweite kippbare Ebene (11) in einer horizontalen Lage angeordnet ist und auf der Oberseite der genannten zweiten Wand (5) des Maschinenraumes (2) liegt.

Revendications

1. Presse à déformer les pièces à usiner comprenant un dispositif de sécurité, comportant un boîtier de presse (2) pour recevoir une pluralité de matrices (3) et de poinçons (3') de presse agencés dans un plan horizontal dans le boîtier (2) de presse (1 caractérisée en ce qu'une première paroi (4) délimitant ledit boîtier (2) comprend un guide horizontal supérieur (6) portant un coulisseau de glissement (7), en ce que ledit coulisseau de glissement (7), porte, par le biais d'un premier actionneur linéaire (9), un premier plan de retournement (10) supporté par un point d'appui (20) et prévu pour être actionné par un deuxième actionneur linéaire (12), et en ce que ledit coulisseau de glissement (7) porte un deuxième plan de retournement (11) supporté par ledit point d'appui (20) et prévu pour être actionné par un troisième actionneur linéaire supplémentaire (14).

2. Presse à déformer les pièces à usiner selon la revendication 1, caractérisée en ce qu'une deuxième paroi (5) opposée à la première paroi (4) et délimitant ledit boîtier (2) comprend un étage interne (8) sur celle-ci, ledit étage interne (8) portant une portion d'extrémité libre du premier plan de retournement (10) lorsque ledit premier plan de retournement (10) est dans une position horizontale.

3. Presse à déformer les pièces à usiner selon la revendication 1, caractérisée en ce que le premier plan de retournement (10) est supporté par une structure en forme de Z (13) faisant saillie, avec ledit premier plan de retournement (10) dans une position horizontale, dans le boîtier (2).

4. Presse à déformer les pièces à usiner selon la revendication 1, caractérisée en ce que le deuxième plan de retournement (11) se situe, dans une position horizontale de celui-ci, sur un dessus de ladite deuxième paroi (5) délimitant le boîtier (2).

Drawing